Unhook all the equipment, and use some soapy water and a sponge and carefully and meticulously clean every inch of the grow chamber. Remember to open up an oscillating fan and clean that too, if you use one. Pollen can be a real hassle to get rid of, but it's better to get rid of it than deal with unwanted seeds for several more growth cycles. Getting pollen wet will make it useless, so just do a thorough job and you should be okay. You might have a few stray seeds on a plant here or there but most likely not if you clean well.